Some relatives of victims who died a decade ago at the World Trade Center gathered yesterday at Ground Zero to decry a plan to place more than 9,000 unidentified pieces of human remains at a subterranean site at the National September 11 Memorial & Museum.

“The families here today say no” to a plan that would locate the unclaimed remains seven stories below ground, said the families’ attorney, Norman Siegel. “They believe that the remains should be placed in a respectful and accessible location, such as something akin to the Tomb of the Unknowns above ground and separate from the museum.”

Sally Regenhard, whose firefighter son, Christian, died at the World Trade Center, said families had not been consulted about where the remains would be placed and felt the proposed location was disrespectful. She said city and museum officials have never formally informed relatives of those killed about the plans.

However, Christy Ferer, who lost her husband in the attacks and who worked as a liaison for Mayor Bloomberg with 9/11 relatives, said the location was chosen at the behest of families.

“They wanted them placed as close to bedrock as possible,” Ferer said.